# Skipping Numbers in ASCII

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In the autoit help file under Random there is an example for a random letter. I don't seem to understand this for some reason...

```;Random letter
If Random() < 0.5 Then
;Capitals
\$Letter = Chr(Random(Asc("A"), Asc("Z"), 1))
Else
;Lower case
\$Letter = Chr(Random(Asc("a"), Asc("z"), 1))
Endif```

I dont get what the \$Letter is doing, tried to look it up in the index and found nothing.

Also I dont understand the < 0.5

And confused on the Chr and Asc. I know thats like the hole script but Im new and im just trying to learn ...

Like if someone could basically just explain what everything in this script and what it does for the script that would be sweet =)

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Random without parameters will return a float number .. the number will be less than 1. So the code is saying if Random() returns a number less than 0.5 make capital letters, otherwise, make lower case.

http://www.autoitscript.com/autoit3/docs/appendix/ascii.htm

Chr() converts a decimal number zero to 255 to it's ASCII character value. So Chr(65) would be "A".

Asc() converts an ascii character value to a decimal, so Asc("A") would equal 65.

Rewritten:

```Local \$s_letter = ""
Local \$n_number = Random()
If \$n_number < 0.5 Then
\$s_letter = Chr(Random(65, 90, 1)); "A - Z", random
Else
\$s_letter = Chr(Random(97, 122, 1)); "a - z", random
EndIf

MsgBox(64, "Info", "\$n_number = " & \$n_number & @CRLF & "\$s_letter = " & \$s_letter)```

Common sense plays a role in the basics of understanding AutoIt... If you're lacking in that, do us all a favor, and step away from the computer.

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At first I was like o.- what the then I tried the code you said, makes so much more sense. Thanks so much man!

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How do I skip numbers in this? Like i only want Caps and non caps no symbols

```Local \$s_letter = ""
\$s_letter = Chr(Random(65, 122, 1)); "A - Z", random
MsgBox(64, "Info", @CRLF & "\$s_letter = " & \$s_letter)```

anyone know how?

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I dont want any symbols, its prolly impossible but giving it a try on here. Like just Cap letters and noncaps.

```Local \$s_letter = ""
\$s_letter = Chr(Random(65, 122, 1)); "A - Z", random
MsgBox(64, "Info", @CRLF & "\$s_letter = " & \$s_letter)```

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```\$s_letter = _GenerateLetter()
MsgBox(64, "Info", @CRLF & "\$s_letter = " & \$s_letter)

Func _GenerateLetter()
Local \$Uletter
Local \$Lletter
\$Uletter = Chr(Random(65, 90, 1)); "A - Z", random
\$Lletter = Chr(Random(97, 122, 1)); "a - z", random
If Random(0, 1, 1) Then
Return \$Uletter
Else
Return \$Lletter
EndIf
EndFunc```

Uppercase letters are in ASCII 65-90 and Lowercase are in 97-122. the random you had inluded 91-96 which are symbols.

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Don't bump posts within 24 hours of your last post, and don't post duplicate topics on the same subject.

Common sense plays a role in the basics of understanding AutoIt... If you're lacking in that, do us all a favor, and step away from the computer.

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